An afternoon entertainment at which there is dancing and tea is served; a tea dance.

an afternoon entertainment at which there is dancing and tea is served; = thé dansant, n.; also Canadian, ‘a social gathering held by Indians…

(a) one of an evening's dances after which the men escort their partners to supper; (b) a dancing party at which supper is served.

a thé dansant, usually at a hotel or other gathering place, arranged for the purpose of dancing the tango (disused).

= thé dansant, n. Now rare.